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Cell Phone Alerts Today Will Mark Start of California's 'Drop, Cover and Hold On' Quake Drill
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By Associated Press
Published 1 year ago on
October 19, 2023

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SACRAMENTO — People will duck under desks and tables in California and around the world on Thursday for an annual drill practicing ways to stay safe during earthquakes.

ShakeOut Drill

Up and down the West Coast, the ShakeOut drill is scheduled to begin at 10:19 a.m. with a cellphone-rattling test alert from the region’s ShakeAlert earthquake warning system.

For many it would be the second alert of the day, following an errant predawn message that hit some phones with a voice message announcing the test. The U.S. Geological Survey said it was likely due to a mix-up in time zones set in the test alert system.

Recent Earthquake

The real thing happened a day earlier, however, when a magnitude 4.2 quake struck southwest of the Sacramento-San Joaquin River Delta region.

The tremor triggered a warning from the ShakeAlert system, which detects the start of a quake and sends warnings to areas expected to experience shaking. The quake proved to be weaker than the near-instantaneous initial estimate and no damage was reported.

ShakeOut Earthquake Drills

The ShakeOut earthquake drills are coordinated by the Southern California Earthquake Center at the University of Southern California. The event focuses on the “drop, cover, and hold on” mantra for basic personal safety but also includes such measures as passenger trains slowing down for several minutes.

The ShakeOut drill originated in California in 2008. The first one was based on a scenario of a magnitude 7.8 earthquake on the southern section of California’s mighty San Andreas Fault. It’s the type of disastrous quake that experts say will happen, although they can’t say when.

The drill has since expanded internationally. Schools, government organizations, companies and others sign up to take part. More than 10 million people were registered this year in California, and millions more worldwide, according to organizers.

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